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Old 31st March 2004, 05:26 PM   #1
owel is offline owel  United States
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Default PC or USB Oscilloscope

Does anyone here use or can recommend a good PC oscilloscope, USB connection.

Preferably with software that can do spectrum analysis or dual trace and not so expensive?

Thanks
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Old 31st March 2004, 06:02 PM   #2
branas is offline branas  United States
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Default USB Oscilliscope

http://www.parallax.com/detail.asp?product_id=2811

Never used it but have used other parts from them and they seem to be a good company.

OPTAscope Technical Specifications:

2 Channels
1 Ms/s Maximum Sample Rate with One Channel
500 Ks/s Sample Rate with Two Channels
20 Vpp Maximum Input for Channel 1 and Channel 2
200 kHz Bandwidth
8-Bit Vertical Resolution
1 M Ohm Input Impedance
Trigger on Rising or Falling Edge at any Voltage
Variable Trigger voltage on Channels 1 and 2
Horizontal Trigger Position Settings at 10%, 50%, and 90%
Auto and Normal Trigger Modes
3 probes
USB 1.1 Support (no additional power supply required!)
Size: 5 x 2.25 x 1.5 (in.); 12.7 x 5.7 x 3.8 (cm)
Weight: 8 oz; 227 gm
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Old 31st March 2004, 06:29 PM   #3
owel is offline owel  United States
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Is the link right? I can't get it to display. "not found in inventory"
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Old 31st March 2004, 07:16 PM   #4
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Just need a 9 on the end of that link.
http://www.parallax.com/detail.asp?product_id=28119

looks pretty cool, except the 20vpp input, I wonder if you can use standard 10x probes to get more voltage? 200Khz bandwidth isn't that great tho. You'd be better off with a used Tek for the same price, with 50Mhz or 100Mhz bandwith.
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Old 31st March 2004, 07:21 PM   #5
branas is offline branas  United States
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Yeah, I wondered if it would work for an audio application, this oscilliscope is manufactured for troubleshooting low voltage electronics. I think they are in stock after mid-april.
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Old 31st March 2004, 07:41 PM   #6
owel is offline owel  United States
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$189... and no spectrum analyzer... for that price I agree a used Oscilloscope on ebay will be better. Thanks for the suggestion though.

I've seen the pico USB product, but will cost me $500 to $800... but it includes the spectrum analyzer.

I need the S.A. 'cause I'll be using this for testing audio projects, gear, etc...
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Old 31st March 2004, 07:48 PM   #7
sam9 is offline sam9  United States
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I looked in to the Pico once. At that time if you do some web surfing there were a couple of sources that knocked off between US100-200. At least for the 16-bit version.
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Old 31st March 2004, 07:57 PM   #8
owel is offline owel  United States
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What do you guys think about this one? Also USB, with spectrum analyzer, but cheaper than the Pico... I also like that it's a tabletop model.

http://www.bitscope.net/store/?p=view&i=item+2
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Old 31st March 2004, 08:47 PM   #9
DRC is offline DRC  United Kingdom
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You probably need 16 bit for audio spectrum analysis.

Dave
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Old 31st March 2004, 09:55 PM   #10
sam9 is offline sam9  United States
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If you are looking at THD, 16 bits lets you measure down to ~.001%-.002% while 8 or 12 bits is more limiting. If you are a low THD+N fanatic you long for a 24 bit scope!
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